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arXiv · 1312.5915

Tightened estimation can improve the key rate of MDI-QKD by more than $100\%$

Y. H. Zhou·Z. W. Yu·X. B. Wang
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Abstract

We present formulas to tightly upper bound the phase-flip errors in decoy state method by using 4 intensities. Our result compressed the bound to about a quarter of known result for MDI-QKD. Based on this, we find that the key rate is improved by more than $100\%$ given weak coherent state sources (WCS), and even more than $200\%$ with the heralded single-photon sources (HSPS).

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Y. H. Zhou, Z. W. Yu, X. B. Wang. 2013-12-20. Tightened estimation can improve the key rate of MDI-QKD by more than $100\%$. https://arxiv.org/abs/1312.5915

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